/*

   Copyright 2001-2003  The Apache Software Foundation 

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.

 */
package org.apache.batik.transcoder.image;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;

import java.io.ByteArrayOutputStream;

import java.util.Map;
import java.util.HashMap;

import org.apache.batik.transcoder.TranscoderInput;
import org.apache.batik.transcoder.TranscoderOutput;

import org.apache.batik.dom.svg.SVGDOMImplementation;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.DOMImplementation;

/**
 * Test the ImageTranscoder with the KEY_BACKGROUND_COLOR transcoding hint.
 *
 * @author <a href="mailto:Thierry.Kormann@sophia.inria.fr">Thierry Kormann</a>
 * @version $Id$ 
 */
public class BackgroundColorTest extends AbstractImageTranscoderTest {

    /**
     * Constructs a new <tt>BackgroundColorTest</tt>.
     */
    public BackgroundColorTest() {
    }

    /**
     * Creates the <tt>TranscoderInput</tt>.
     */
    protected TranscoderInput createTranscoderInput() {
	DOMImplementation impl = SVGDOMImplementation.getDOMImplementation();
	String svgNS = SVGDOMImplementation.SVG_NAMESPACE_URI;
	Document doc = impl.createDocument(svgNS, "svg", null);

	Element root = doc.getDocumentElement();

	root.setAttributeNS(null, "width", "400");
	root.setAttributeNS(null, "height", "400");

	Element r = doc.createElementNS(svgNS, "rect");
	r.setAttributeNS(null, "x", "100");
	r.setAttributeNS(null, "y", "50");
	r.setAttributeNS(null, "width", "100");
	r.setAttributeNS(null, "height", "50");
	r.setAttributeNS(null, "style", "fill:red");
	root.appendChild(r);

	return new TranscoderInput(doc);
    }
    
    /**
     * Creates a Map that contains additional transcoding hints.
     */
    protected Map createTranscodingHints() {
	Map hints = new HashMap(7);
	hints.put(ImageTranscoder.KEY_BACKGROUND_COLOR, Color.blue);
	return hints;
    }

    /**
     * Returns the reference image for this test.
     */
    protected byte [] getReferenceImageData() {
        try {
            BufferedImage img = new BufferedImage
                (400, 400, BufferedImage.TYPE_INT_ARGB);
            Graphics2D g2d = img.createGraphics();
            g2d.setColor(Color.blue);
            g2d.fillRect(0, 0, 400, 400);
            g2d.setColor(Color.red);
            g2d.fillRect(100, 50, 100, 50);
            ByteArrayOutputStream ostream = new ByteArrayOutputStream();
            PNGTranscoder t = new PNGTranscoder();
            TranscoderOutput output = new TranscoderOutput(ostream);
            t.writeImage(img, output);
            return ostream.toByteArray();
        } catch (Exception ex) {
            throw new RuntimeException("BackgroundColorTest error");
        }
    }
}
